Related by context. Frequent words. (Click for all words.) 80 Asarco 58 Grupo Mexico 57 Phelps Dodge 53 Kennecott 49 Placer Dome 49 Teck Cominco 49 Noranda 47 ADEQ 47 TCEQ 47 smelter 47 Sterlite 47 Doe Run 46 Newmont 46 Cemex 45 Las Cristinas 45 USW 44 Crystallex 44 Escondida 43 Vale Inco 43 Wheeling Pittsburgh 43 copper smelter 43 Inco 43 Tronox 43 Freeport McMoRan 43 Bashas 42 Stelco 42 Ternium 42 smelting 42 Falconbridge 42 Fresnillo 42 CEMEX 42 Rocky Flats 42 Inmet 42 tailings 41 Goldcorp 41 Barrick Gold Corporation 41 copper 41 Silver Wheaton 41 Smurfit Stone 40 Sterlite Industries 40 Calpine 40 Lyondell 40 ore 40 Kerr McGee 40 Minera 40 molybdenum 40 Phelps Dodge Corp. 40 Newmont Mining Corporation 40 Rusoro 39 Cleveland Cliffs 39 Barrick 39 Allied Waste 39 Luminant 39 Clean Water Act 39 Teck 39 KCM 39 Cliffs Natural Resources 39 TUSD 39 mine 39 Inco Ltd. 39 Codelco 39 groundwater contamination 39 Abitibi 39 BHP 39 mining 39 Hecla 39 Wheeling Pitt 39 ADOT 39 AngloGold Ashanti 39 Gerdau 39 Dynegy 38 Nucor 38 Steelworkers 38 AbitibiBowater 38 SemGroup 38 Mirant 38 TXU 38 PBGC 38 Ivanhoe Mines 38 metallurgical 38 HudBay 38 PGE 38 NovaGold 38 Lundin Mining 38 Covanta 38 Kinbauri 38 Kinder Morgan 38 Coeur 38 Alcan 38 Reclamation 38 Solutia 38 Xstrata 38 CVRD 38 Yucca 38 manganese 38 Massey Energy 38 Coeur d' Alene Mines 37 Agnico Eagle 37 United Steelworkers 37 Patriot Coal 37 Fronteer